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Racer ako (abliwhite)
Race Number 115
Date Wed, 10 May 2017 15:51:26 +0000
Speed 49 WPM Try to beat?
Accuracy 88.1%
Rank 3rd place (out of 4)
Opponents awesomeev10 (2nd place)

Text typed:

In two dimensions we say that a rigid body has only one rotational degree of freedom, whereas in three dimensions we say that a rigid body has three rotational degrees of freedom. This might lead you to infer that in three dimensions you need to have three scalar quantities to represent a body's rotation. Indeed, this is the minimum requirement.
Physics for Game Developers (book) by David M Bourg (see stats)